Date: Mon, 31 Dec 2012 07:53:58 -0800 (PST) From: Barney Cordoba <barney_cordoba@yahoo.com> To: linimon@FreeBSD.org Cc: freebsd-net@freebsd.org Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe driver Message-ID: <1356969238.85857.YahooMailClassic@web121602.mail.ne1.yahoo.com> In-Reply-To: <201212310728.qBV7SPKC064686@freefall.freebsd.org>
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--- On Mon, 12/31/12, linimon@FreeBSD.org <linimon@FreeBSD.org> wrote: > From: linimon@FreeBSD.org <linimon@FreeBSD.org> > Subject: Re: kern/174851: [bxe] [patch] UDP checksum offload is wrong in bxe driver > To: linimon@FreeBSD.org, freebsd-bugs@FreeBSD.org, freebsd-net@FreeBSD.org > Date: Monday, December 31, 2012, 2:28 AM > Old Synopsis: UDP checksum offload is > wrong in bxe driver > New Synopsis: [bxe] [patch] UDP checksum offload is wrong in > bxe driver > > Responsible-Changed-From-To: freebsd-bugs->freebsd-net > Responsible-Changed-By: linimon > Responsible-Changed-When: Mon Dec 31 07:28:11 UTC 2012 > Responsible-Changed-Why: > Over to maintainer(s). > > http://www.freebsd.org/cgi/query-pr.cgi?pr=174851 > _______________________________________________ > freebsd-net@freebsd.org > mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > Has anyone done an analysis on modern hardware as to whether udp csum offloading is actually beneficial? Even on 2007 hardware I came to the conclusion that using offloading was a negative. Reminds me of the days when people were using "intelligent" ethernet cards that were slower than the host cpu. The handshaking cost you more than just using shared memory. BChome | help
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